JP2545261Y2 - Information recording medium - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium for recording visible information by heating or photosensitive.

[0002]

2. Description of the Related Art As an information recording medium having an information recording layer for recording visible information by heat, for example, a base material is coated with a leuco dye or the like which changes color by heat, or a vapor deposited layer of Sn or the like which melts by heating. There is a thermal recording card formed by applying it to a base material. Further, as an information recording medium provided with an information recording layer for recording visible information by exposure to light, for example, a substrate coated with an optical recording material that changes color, develops or loses color by irradiation with light of a specific wavelength such as photochromic. There is a recording card.

[0003] Such an information recording card has the advantage that the information displayed on the card can be checked at any time without a special reading device, since visible information can be arbitrarily added thereto. It is used in various directions.

For example, as a prepaid card, an information recording card having a magnetic recording layer for magnetically recording information and a thermosensitive recording layer as a visible information recording layer corresponding to the information recorded on the magnetic recording layer is used. I have.

[0005] This is because the balance of prepaid cards needs to be managed, so that the balance is managed by magnetic information, and the card user must directly check the balance from the magnetic information unless using a reader. Therefore, the balance is displayed on the heat-sensitive layer as visible information.

[0006] An information recording card used for a railway coupon is a card that records the number of times of use on a magnetic recording layer and displays the name of the getting on / off station corresponding to the use section on a thermosensitive layer. Have been.

[0007] As for securities such as checks, stock certificates, gift certificates, etc., the amount of money or the like is displayed by printing at present, but like the above-mentioned prepaid cards and railway coupons, such as heat-sensitive layer. By providing the information recording layer, the amount and the like can be displayed as needed, which is convenient.

[0008]

However, the visible information recorded on the heat-sensitive or light-sensitive information recording layer is made by making a false indication on the information recording layer or by shaving off the information recording layer. Since it is difficult to discriminate a false display, there is a possibility that it is easily falsified. For example Figure 3
As shown in (1), if a part of the number displayed on the heat-sensitive layer of the prepaid card c is falsified by retouching, the remaining amount is increased.

When the information recording layer is combined with the magnetic recording layer, the information recorded on the magnetic recording layer and the visible information displayed on the information recording layer correctly correspond as long as the information recording medium is used properly. Things.

However, the contents of magnetic recording can be rewritten, and even if the contents cannot be rewritten, the contents can be easily destroyed. Therefore, the recorded information recorded on the magnetic recording layer is not always complete. I can't affirm it. For this reason, there is a possibility that the display of the information recording layer is falsified and the information recording card is abused, thereby deteriorating the reliability of the information recording medium.

[0011] In addition, since there is a possibility that the information recording layer is easily counterfeited as described above, it is necessary to provide an information recording layer such as a heat-sensitive layer for securities requiring display reliability. Could not be displayed in accordance with the amount.

In order to determine the authenticity of the information recording card itself, a hologram is pasted on the card, etc., but it is necessary to determine the authenticity of the visible information itself displayed on the information recording layer. There has been no means of the prior art.

In view of the above prior art, an object of the present invention is to provide an information recording medium which makes it difficult to falsify the display contents of an information recording layer.

[0014]

A feature of the information recording medium according to the present invention is that in an information recording medium provided with an information recording layer for recording visible information by heat or photosensitivity on a base material, A pattern, a mark, a pattern, a copy-forgery-inhibited pattern such as a character is formed on a recording portion of visible information in the layer and on at least one side of the base material side and the facing side, so that it is visible only after recording of the visible information. On the point.

[0015]

[0016]

According to the configuration of the present invention, when a false display is given from above the information recording layer, the tint block cannot be visually recognized. In addition, when a false display is given by shaving the information recording layer, the tint block is also cut off, so that the tint block cannot be visually observed. The tint block is authentic
Is formed so that it can be viewed only after recording
It is difficult to forge.

[0017]

EXAMPLES The following comparative examples of the present invention with reference to the accompanying drawings
This will be described in comparison with an example .

FIG. 1 schematically shows a cross section of an information recording medium C according to a comparative example of the present invention.
A magnetic recording layer 2 laminated on one surface side of the substrate 1,
Thermal layer (information recording layer) 3 laminated on the magnetic recording layer 2
And a transparent protective layer 4 laminated on the heat-sensitive layer 3.

The substrate 1 is made of a flexible material such as a synthetic resin, and a decoration 5 such as a picture is provided on the upper surface thereof. The thickness of the substrate 1 is set to about several 100 μm.

The substrate 1 may be in the form of a sheet or a plate, and its thickness is suitably about 0.005 to 5 mm. Also, as materials, nylon, cellulose diacetate, cellulose triacetate, polystyrene, polyethylene, polypropylene, polyester, polyimide,
Plastics such as polycarbonate, metals such as copper and aluminum, paper, impregnated paper and combinations of the above are suitable.

The magnetic recording layer 2 is made of, for example, BaO6Fe ₂ O
₃ is formed by coating it on the lower surface of the substrate 1 in the form of ink, and its thickness is about 10 μm.

The thickness of the magnetic recording layer 2 is 1 to 100 μm.
m is appropriate and preferably 1 to 10 μm. Also,
Magnetic recording layer 2 is r-Fe ₂ O _3, Co deposited r-Fe ₂ O
_{3, Fe 3 O 4, CrO} 3, Fe, Fe-Co, Fe-
Magnetic particles such as Cr, Co-Cr, Co-Ni, MnAl, Ba ferrite, and Sr ferrite are dispersed in a resin such as a petalal resin, a urethane resin, a polyester resin, or an ink vehicle, and the dispersion is subjected to a gravure method. It can be formed by coating the substrate 1 by a coating method such as a roll method or a knife edge method.

In the present embodiment, the heat-sensitive layer 3 is a deposited layer of Sn and has a thickness of about 0.1 μm. And
The heat receiving portion is destroyed by receiving the heat, and the heat receiving portion is removed, so that information such as characters composed of the ground color on the upper side of the heat sensitive layer 3 becomes visible. In the case where the heat-sensitive layer 3 is a vapor-deposited layer, Cu, Fe, Ga, Ge, Hg, In, Li, M
g, Mn, Mo, Nb, Ni, Os, Pb, Pa, P
t, Rn, Sb, Se, Si, Ta, Te, Th, T
i, U, V, W, Zn, Zr, and compounds or alloys thereof can be used.

The protective layer 4 is coated with, for example, an OP varnish,
Alternatively, it is a transparent layer having a thickness of about 2 μm formed by applying a transparent plastic such as vinyl chloride.

Then, on the opposite side of the heat-sensitive layer 3 from the substrate,
Are formed. The copy-forgery-inhibited pattern 6 can be applied by, for example, offset printing, can be a pattern, a mark, a picture or a character, and has a thickness of about 1 to 2 μm.

In the information recording medium C having the above-described structure, certain information is recorded on the magnetic recording layer 2 by a magnetic recording head (not shown).
For example, in the case of a prepaid card, a fixed balance is recorded. Further, visible information corresponding to the information recorded on the magnetic recording layer 2, for example, a number indicating a specific balance is displayed by heating the thermosensitive layer 3 with the thermal head H. This display is made by the fact that a part of the vapor deposition material constituting the heat sensitive layer 3 is destroyed by the heat reception, but the tint block 6 is held by the protective layer 4 and is visible even after the vapor deposition material is destroyed. is there.

Accordingly, when false display is performed by adding a brush or the like from above the heat-sensitive layer 3, the tint block 6 cannot be viewed, and when the heat-sensitive layer 3 is scraped and false display is performed, the tint block 6 is also added. Since the copy-forgery-inhibited pattern is scraped off, the copy-forgery-inhibited pattern 6 cannot be seen, and it can be determined that the copy-forgery-inhibited pattern is falsely displayed.

[0028] Figure 2 is an information recording medium C of the actual施例, difference between the comparative example is a tint block 6 in that provided on the substrate side of the thermosensitive layer 3. Others are the same as the comparative example .

According to the real施例this, a part of the deposition material constituting the heat-sensitive layer 3 can not be visually tint block 6 until it is destroyed by heat, time after the information display by the heat In, the copy-forgery-inhibited pattern 6 can be visually checked.

Also in this case, when the false indication is given from the top of the heat-sensitive layer 3 or the false indication is performed by scraping the heat-sensitive layer 3, the copy-forgery-inhibited pattern 6 cannot be visually recognized. can do. Furthermore, the land
Crest 6 can be seen only after recording the genuine visible information
Is more difficult to forge than the comparative example.
You.

[0031]

[0032]

[0033]

[0034]

[0035]

[0036]

[0037]

[0038]

[0039]

The present invention is not limited to the above embodiment, but may be combined with other recording members other than the magnetic recording layer.
It is also applicable to gift certificates and the like.

Further, although the above you施例constituted by the heat-sensitive layer comprising a heat-sensitive recording material to color development or melted by heating an information recording layer for displaying visual information, the color of the irreversible reaction by irradiation with light of a particular wavelength, The information recording layer may be made of a photochromic material or an infrared coloring material that discolors or decolors, and the same effect can be obtained.

Further, a copy-forgery-inhibited pattern may be formed on both the base material side and the facing side of the information recording layer.

[0043]

According to the present invention, the copy-forgery-inhibited pattern can be visually recognized even if a false display is given on the information recording layer or an easy false display is made by cutting off the information recording layer and giving a false display. By being unable to do so, it can be easily determined to be a false indication, and it is difficult to forge.
Therefore, the reliability of the information recording medium can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic diagram for explaining a configuration of an information recording medium according to a comparative example of the present invention.

[2] configuration explanatory schematic diagram of an information recording medium according to real施例of the present invention

FIG. 3 is an explanatory diagram of a forgery aspect of an information recording medium.

[Explanation of symbols]

 2 magnetic recording layer 3 heat-sensitive layer (information recording layer) 6 ground pattern C information recording medium

Claims (1)

(57) [Scope of request for utility model registration] 1. An information recording medium provided with an information recording layer for recording visible information by heat or light on a base material, wherein a visible information recording portion of the information recording layer is provided on a base material side and a facing side thereof. An information recording medium characterized in that a ground pattern such as a pattern, a mark, a picture, a character, etc. is formed on at least one side so as to be visible only after recording of the visible information.